From 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 Mon Sep 17 00:00:00 2001 From: Yunhong Jiang Date: Tue, 4 Aug 2015 12:17:53 -0700 Subject: Add the rt linux 4.1.3-rt3 as base Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang --- kernel/arch/mips/bcm63xx/clk.c | 410 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 410 insertions(+) create mode 100644 kernel/arch/mips/bcm63xx/clk.c (limited to 'kernel/arch/mips/bcm63xx/clk.c') diff --git a/kernel/arch/mips/bcm63xx/clk.c b/kernel/arch/mips/bcm63xx/clk.c new file mode 100644 index 000000000..637565284 --- /dev/null +++ b/kernel/arch/mips/bcm63xx/clk.c @@ -0,0 +1,410 @@ +/* + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * Copyright (C) 2008 Maxime Bizon + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +struct clk { + void (*set)(struct clk *, int); + unsigned int rate; + unsigned int usage; + int id; +}; + +static DEFINE_MUTEX(clocks_mutex); + + +static void clk_enable_unlocked(struct clk *clk) +{ + if (clk->set && (clk->usage++) == 0) + clk->set(clk, 1); +} + +static void clk_disable_unlocked(struct clk *clk) +{ + if (clk->set && (--clk->usage) == 0) + clk->set(clk, 0); +} + +static void bcm_hwclock_set(u32 mask, int enable) +{ + u32 reg; + + reg = bcm_perf_readl(PERF_CKCTL_REG); + if (enable) + reg |= mask; + else + reg &= ~mask; + bcm_perf_writel(reg, PERF_CKCTL_REG); +} + +/* + * Ethernet MAC "misc" clock: dma clocks and main clock on 6348 + */ +static void enet_misc_set(struct clk *clk, int enable) +{ + u32 mask; + + if (BCMCPU_IS_6338()) + mask = CKCTL_6338_ENET_EN; + else if (BCMCPU_IS_6345()) + mask = CKCTL_6345_ENET_EN; + else if (BCMCPU_IS_6348()) + mask = CKCTL_6348_ENET_EN; + else + /* BCMCPU_IS_6358 */ + mask = CKCTL_6358_EMUSB_EN; + bcm_hwclock_set(mask, enable); +} + +static struct clk clk_enet_misc = { + .set = enet_misc_set, +}; + +/* + * Ethernet MAC clocks: only revelant on 6358, silently enable misc + * clocks + */ +static void enetx_set(struct clk *clk, int enable) +{ + if (enable) + clk_enable_unlocked(&clk_enet_misc); + else + clk_disable_unlocked(&clk_enet_misc); + + if (BCMCPU_IS_3368() || BCMCPU_IS_6358()) { + u32 mask; + + if (clk->id == 0) + mask = CKCTL_6358_ENET0_EN; + else + mask = CKCTL_6358_ENET1_EN; + bcm_hwclock_set(mask, enable); + } +} + +static struct clk clk_enet0 = { + .id = 0, + .set = enetx_set, +}; + +static struct clk clk_enet1 = { + .id = 1, + .set = enetx_set, +}; + +/* + * Ethernet PHY clock + */ +static void ephy_set(struct clk *clk, int enable) +{ + if (BCMCPU_IS_3368() || BCMCPU_IS_6358()) + bcm_hwclock_set(CKCTL_6358_EPHY_EN, enable); +} + + +static struct clk clk_ephy = { + .set = ephy_set, +}; + +/* + * Ethernet switch clock + */ +static void enetsw_set(struct clk *clk, int enable) +{ + if (BCMCPU_IS_6328()) + bcm_hwclock_set(CKCTL_6328_ROBOSW_EN, enable); + else if (BCMCPU_IS_6362()) + bcm_hwclock_set(CKCTL_6362_ROBOSW_EN, enable); + else if (BCMCPU_IS_6368()) + bcm_hwclock_set(CKCTL_6368_ROBOSW_EN | + CKCTL_6368_SWPKT_USB_EN | + CKCTL_6368_SWPKT_SAR_EN, + enable); + else + return; + + if (enable) { + /* reset switch core afer clock change */ + bcm63xx_core_set_reset(BCM63XX_RESET_ENETSW, 1); + msleep(10); + bcm63xx_core_set_reset(BCM63XX_RESET_ENETSW, 0); + msleep(10); + } +} + +static struct clk clk_enetsw = { + .set = enetsw_set, +}; + +/* + * PCM clock + */ +static void pcm_set(struct clk *clk, int enable) +{ + if (BCMCPU_IS_3368()) + bcm_hwclock_set(CKCTL_3368_PCM_EN, enable); + if (BCMCPU_IS_6358()) + bcm_hwclock_set(CKCTL_6358_PCM_EN, enable); +} + +static struct clk clk_pcm = { + .set = pcm_set, +}; + +/* + * USB host clock + */ +static void usbh_set(struct clk *clk, int enable) +{ + if (BCMCPU_IS_6328()) + bcm_hwclock_set(CKCTL_6328_USBH_EN, enable); + else if (BCMCPU_IS_6348()) + bcm_hwclock_set(CKCTL_6348_USBH_EN, enable); + else if (BCMCPU_IS_6362()) + bcm_hwclock_set(CKCTL_6362_USBH_EN, enable); + else if (BCMCPU_IS_6368()) + bcm_hwclock_set(CKCTL_6368_USBH_EN, enable); +} + +static struct clk clk_usbh = { + .set = usbh_set, +}; + +/* + * USB device clock + */ +static void usbd_set(struct clk *clk, int enable) +{ + if (BCMCPU_IS_6328()) + bcm_hwclock_set(CKCTL_6328_USBD_EN, enable); + else if (BCMCPU_IS_6362()) + bcm_hwclock_set(CKCTL_6362_USBD_EN, enable); + else if (BCMCPU_IS_6368()) + bcm_hwclock_set(CKCTL_6368_USBD_EN, enable); +} + +static struct clk clk_usbd = { + .set = usbd_set, +}; + +/* + * SPI clock + */ +static void spi_set(struct clk *clk, int enable) +{ + u32 mask; + + if (BCMCPU_IS_6338()) + mask = CKCTL_6338_SPI_EN; + else if (BCMCPU_IS_6348()) + mask = CKCTL_6348_SPI_EN; + else if (BCMCPU_IS_3368() || BCMCPU_IS_6358()) + mask = CKCTL_6358_SPI_EN; + else if (BCMCPU_IS_6362()) + mask = CKCTL_6362_SPI_EN; + else + /* BCMCPU_IS_6368 */ + mask = CKCTL_6368_SPI_EN; + bcm_hwclock_set(mask, enable); +} + +static struct clk clk_spi = { + .set = spi_set, +}; + +/* + * HSSPI clock + */ +static void hsspi_set(struct clk *clk, int enable) +{ + u32 mask; + + if (BCMCPU_IS_6328()) + mask = CKCTL_6328_HSSPI_EN; + else if (BCMCPU_IS_6362()) + mask = CKCTL_6362_HSSPI_EN; + else + return; + + bcm_hwclock_set(mask, enable); +} + +static struct clk clk_hsspi = { + .set = hsspi_set, +}; + + +/* + * XTM clock + */ +static void xtm_set(struct clk *clk, int enable) +{ + if (!BCMCPU_IS_6368()) + return; + + bcm_hwclock_set(CKCTL_6368_SAR_EN | + CKCTL_6368_SWPKT_SAR_EN, enable); + + if (enable) { + /* reset sar core afer clock change */ + bcm63xx_core_set_reset(BCM63XX_RESET_SAR, 1); + mdelay(1); + bcm63xx_core_set_reset(BCM63XX_RESET_SAR, 0); + mdelay(1); + } +} + + +static struct clk clk_xtm = { + .set = xtm_set, +}; + +/* + * IPsec clock + */ +static void ipsec_set(struct clk *clk, int enable) +{ + if (BCMCPU_IS_6362()) + bcm_hwclock_set(CKCTL_6362_IPSEC_EN, enable); + else if (BCMCPU_IS_6368()) + bcm_hwclock_set(CKCTL_6368_IPSEC_EN, enable); +} + +static struct clk clk_ipsec = { + .set = ipsec_set, +}; + +/* + * PCIe clock + */ + +static void pcie_set(struct clk *clk, int enable) +{ + if (BCMCPU_IS_6328()) + bcm_hwclock_set(CKCTL_6328_PCIE_EN, enable); + else if (BCMCPU_IS_6362()) + bcm_hwclock_set(CKCTL_6362_PCIE_EN, enable); +} + +static struct clk clk_pcie = { + .set = pcie_set, +}; + +/* + * Internal peripheral clock + */ +static struct clk clk_periph = { + .rate = (50 * 1000 * 1000), +}; + + +/* + * Linux clock API implementation + */ +int clk_enable(struct clk *clk) +{ + mutex_lock(&clocks_mutex); + clk_enable_unlocked(clk); + mutex_unlock(&clocks_mutex); + return 0; +} + +EXPORT_SYMBOL(clk_enable); + +void clk_disable(struct clk *clk) +{ + mutex_lock(&clocks_mutex); + clk_disable_unlocked(clk); + mutex_unlock(&clocks_mutex); +} + +EXPORT_SYMBOL(clk_disable); + +unsigned long clk_get_rate(struct clk *clk) +{ + return clk->rate; +} + +EXPORT_SYMBOL(clk_get_rate); + +int clk_set_rate(struct clk *clk, unsigned long rate) +{ + return 0; +} +EXPORT_SYMBOL_GPL(clk_set_rate); + +long clk_round_rate(struct clk *clk, unsigned long rate) +{ + return 0; +} +EXPORT_SYMBOL_GPL(clk_round_rate); + +struct clk *clk_get(struct device *dev, const char *id) +{ + if (!strcmp(id, "enet0")) + return &clk_enet0; + if (!strcmp(id, "enet1")) + return &clk_enet1; + if (!strcmp(id, "enetsw")) + return &clk_enetsw; + if (!strcmp(id, "ephy")) + return &clk_ephy; + if (!strcmp(id, "usbh")) + return &clk_usbh; + if (!strcmp(id, "usbd")) + return &clk_usbd; + if (!strcmp(id, "spi")) + return &clk_spi; + if (!strcmp(id, "hsspi")) + return &clk_hsspi; + if (!strcmp(id, "xtm")) + return &clk_xtm; + if (!strcmp(id, "periph")) + return &clk_periph; + if ((BCMCPU_IS_3368() || BCMCPU_IS_6358()) && !strcmp(id, "pcm")) + return &clk_pcm; + if ((BCMCPU_IS_6362() || BCMCPU_IS_6368()) && !strcmp(id, "ipsec")) + return &clk_ipsec; + if ((BCMCPU_IS_6328() || BCMCPU_IS_6362()) && !strcmp(id, "pcie")) + return &clk_pcie; + return ERR_PTR(-ENOENT); +} + +EXPORT_SYMBOL(clk_get); + +void clk_put(struct clk *clk) +{ +} + +EXPORT_SYMBOL(clk_put); + +#define HSSPI_PLL_HZ_6328 133333333 +#define HSSPI_PLL_HZ_6362 400000000 + +static int __init bcm63xx_clk_init(void) +{ + switch (bcm63xx_get_cpu_id()) { + case BCM6328_CPU_ID: + clk_hsspi.rate = HSSPI_PLL_HZ_6328; + break; + case BCM6362_CPU_ID: + clk_hsspi.rate = HSSPI_PLL_HZ_6362; + break; + } + + return 0; +} +arch_initcall(bcm63xx_clk_init); -- cgit 1.2.3-korg